Contractor drawings

Similar lists for suppliers and construction contractors drawings and specifications provided contractually and integrated into the project alphanumeric identification system... 

Detailed e.stimate (firm or contractor s e.stimate). Requires completed drawings, specifications, and site suiweys probable error within 5 percent. 

In another incident a backhoe ruptured a 3-in. polyethylene natural gas pipeline fortunately the gas did not ignite. The drawings were complex and cluttered, and the contractor overlooked the pipeline. A metal detector was not used. This would have detected the pipe as a metal wire was fixed to it, a good practice. In a third incident a worker was hand-digging a trench, as an electric conduit was believed to be present. It was actually an old transfer line for radioactive waste, and he received a small dose of radioactivity. The planner had misread the drawing. 

This exercise also helps you identify gaps in your company s skill and staff base. Where gaps exist—either because the skills are not represented, or the people who have them are not available because of other commitments— you may wish to consider drawing on outside consultants. For the purposes of resource allocation, consultants or contractors are best considered in terms of the value they add in either of two categories (or both) supplementary skills and supplementary time. 

The prerequisite for proper planning and performance of building maintenance is the comprehensive set of drawings, specifications and servicing manuals compiled by architects, engineers, contractors and suppliers, respectively. Those responsible for maintenance must ensure that all records are kept up to date computers are increasingly used for this purpose. 

Drawings - Details of drawings and manuals, which the contractor shall supply to other parties (e.g. building work, drawings and working drawings, and a description of details to be supplied). 

Operate the Department of the Army repository of drawing information pertaining to nuclear components received from the Atomic Energy Commission and its contractors... 

Tw o examples will show how carefully plans must be studied. In one case, a stipple finish was requested for the laboratory walls. Although this had been put in writing, the memo slipped through the cracks along the way and never reached the drawings. The walls ended up with a heavily textured finish, the painting contractor s standard treatment for commercial walls. 

The Department of Energy (DOE) Fundamentals Handbooks consist of ten academic subjects, which include Mathematics Classical Physics Thermodynamics, Heat Transfer, and Fluid Flow Instrumentation and Control Electrical Science Material Science Mechanical Science Chemistry Engineering Symbology, Prints, and Drawings and Nuclear Physics and Reactor Theory. The handbooks are provided as an aid to DOE nuclear facility contractors. 

The design criteria of the sprinkler system should be established by a fire protection engineer, whereas the design of sprinkler systems is generally performed by licensed sprinkler contractors. Design calculations and plan drawings should be reviewed by a competent individual. Some important highlights and exceptions to NFPA 13 are ... 

The contractor should submit drawings and calculations for approval before ordering materials. The contractor may be required to submit drawings to insurance underwriters, inspection bureaus, or other regulatory agencies. 

Even before the optimum plant size was determined, a contractor had been selected and process design work was in progress. The contractor was selected on the basis of competitive cost plus fixed-fee bids. The contract was later converted to a turn-key type, based on the competitive-bid fixed-fee percentage and a definitive cost estimate for completion of the job. This saved about 2 months in over-all job completion time. Through duplication of equipment purchases and construction drawings, it was possible to reduce over-all completion time for three subsequent plants by as much as 8 months from the 17 months required for the first module (Fig. 2). About 29 months were required from Geld discovery to startup of the last Exxon treating facility. 

More recently, Liu et al. (8) completed an analysis of two-phase pipelining of coal logs (compressed coal cylinders) by pipeline. In the present article, we draw on the work of Wasp et al. (6), Liu et al. (8), and discussions with a Canadian engineering contractor (D. Williams, personal communication, 3/03) to develop pipeline cost estimates for transporting water slurries of wood chips these costs are also shown in Fig. 1 and Table 1. 

Detailed estimate (contractor s estimate) based on complete engineering drawings, specifications and site surveys. Probable accuracy of estimate is about +5%. 

Construction Document Development The construction documents should convey the intent of the design team and client to the construction team. A good set of construction documents should result in a tight spread of construction bids as there should be little room for varying interpretation on the part of the potential construction contractors. The drawings should have sufficient notes to convey the design intent without creating a cluttered appearance. The written specifications should be as brief as possible consistent with clarity. 

The detailed-t eoff method can rarely if ever be used. When detailed drawings are available, costs may be estimated by pricing materials and components from suppliers catalogs or, for special items, from quotations. Handbooks are available which give typical values of the labor-hours required to perform units of installation work, such as installation of switches, starters, motors, conduit wiring, and push buttons of various sizes, for both hazardous and nonhaz-ardous areas. Labor rates can be obtained from various government statistical sources or elsewhere. For the United States the National Electrical Contractors Association publishes an excellent manual of electrical costs. From the complete plans and specifications, the estimator can take off materials, estimate the labor cost, apply appropriate factors for labor efficiency, productivity, and local conditions, and achieve good results. 

The installation contractor should assist in the provision of as-built drawings that may be completed by others (e.g., the engineering design contractor) at the end of the contract. To assist in this exercise, the installation contractor must keep a set of printouts of all documentation that must be marked up as and when changes are agreed. 

Flandling and approval of contractor s drawings, purchase orders, subcontracts, and materials certification. 

The home office man-hours estimating procedure in Chapter 19 does not provide the detail of breakdown required for progress monitoring. However, once the list of required drawings and specifications has been prepared by the contractor, this information can be used together with Tables 15.3, 15.4, and 15.5 to prepare a simple monitoring system that will enable the Project Manager to ascertain the validity of the contractor s reports. 

Drawings Required are the number of drawings the contractor now estimates will be required to complete all design work. At the beginning of a project, this number is normally lower than what is finally needed. This should not affect the accuracy of the results, for there is a built-in allowance for this. 

After discounting such types, only 35 to 40% remain from the number of drawings the contractor estimates as being required. 

When applied to Phase 1 designs (complete P lD s and arrangement drawings), the quality of the resulting estimates could be as good as the conventional detailed estimates normally prepared by contractors at much greater expense. 

The AEG also disseminates information to ensure that most useful engineering materials are made available. OTI Extension publishes Engineering Materials List to identify, describe, index, and announce the availability of engineering materials (drawings, specifications, etc.). TID-4I00 (1st rev.) and its supplements can be obtained from OTI Extension and are distributed without charge to AEG contractors, organizations, and individuals who have a need for them. 

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